Hi there Rocko,
Once you have your schematic exported as an .exe application, you will need a way to send audio between applications. I haven't done this myself, but I have heard good things about Virtual Audio Cable, which you can find HERE
. According to the website, it is Win7 compatible. Note that is not free - but the cost is quite cheap (about $30).
You would then use the Virtual Audio Cables to send sound from your media players/system sounds etc. into your EQ, and to send the EQ output to your speakers.